If the plug spec'd is an AC Delco Iridium I would not adjust the gap - whatever the part number the old plug is just replace with same. Most of these plugs are "preset" for the application and not to be adjusted like old school plugs.

If the plug spec'd is an AC Delco Iridium I would not adjust the gap - whatever the part number the old plug is just replace with same. Most of these plugs are "preset" for the application and not to be adjusted like old school plugs.